These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Hilarious in Hindsight: A chapter about a rock festival said to be bigger than Woodstock spends over a page listing off stereotypical names for fictional bands; one of the groups so named is Nirvana. In fact, not all the band names are fictional; for example HP Lovecraft were a real sixties garage rock group, and (the original) Nirvana were a sixties psych group.